Arefly

<p>Busy with setting every post’s first image to the Featured Image?</p>
<p>Use this plugin instead!</p>
<p>This plugin will auto set the first image of your post (for new posts only) to Featured Image.</p>
<p>If you do not want set the first image, you can still set your own Featured Image.</p>
<h4>How Does It Work?</h4>
<p>You do not need to set anything after you install and no any options.</p>
<p>The plugin will auto set the first image of your new posts to Featured Image.</p>
<h4>How to exclude a specific post?</h4>
<ol>
<li>
<p>Go in to the post/page you do not want to autoset Featured Image.</p>
</li>
<li>
<p>Find Meta Box name “Custom Field”.</p>
</li>
<li>
<p>Click “Enter new”.</p>
</li>
<li>
<p>Enter “no_featured_image” in Name Table and enter anything in Value Table.</p>
</li>
</ol>


Autoset Featured Image

I can see how this would be useful, though, but for my purposes and by the name of it, I was hoping it'd go through old posts and, if they didn't have a featured image, set the first image.



Wish it worked for existing posts...

Auto Set the first image of your post to Featured Image.

WEN Themes

<h3>WEN Featured Image</h3>
<p>WEN Featured Image helps you to manage featured image for your posts or pages in easy way. Featured image is displayed in the separate column in the listings. You can easily add/edit/remove featured image from the listing page. You can also force featured image for selected post types.</p>
<p>Plugin: <a href="http://wenthemes.com/item/wordpress-plugins/wen-featured-image/" rel="nofollow ugc">Home Page</a></p>
<h4>Translation</h4>
<ul>
<li>Serbo-Croatian – <a href="http://webhostinggeeks.com/" rel="nofollow ugc">Borisa Djuraskovic</a></li>
</ul>
<p>If you like this plugin, please <a href="https://wordpress.org/support/view/plugin-reviews/wen-featured-image" rel="ugc">rate and review</a>.<br />
If you have any question, suggestion or issue, please <a href="https://wordpress.org/support/plugin/wen-featured-image" rel="ugc">post here</a>.</p>


WEN Featured Image

Add featured image column in listings. Add/change/remove featured image directly from the listing page

Autoset Featured Image vs WEN Featured Image